2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104613We discuss some recent results in the quest to implement the holographic principle in asymptotically flat spacetimes. In particular we introduce the key ingredients of the candidate dual theory which lives at null infinity and it is invariant under the asymptotic symmetry group of this class of spacetimes.12 pages, to appear in the proceedings of the IV International Symposium on Quantum Theory and Symmetries (15-21 August 2005, Varna in Bulgaria)High Energy Physics - TheoryGeneral Relativity and Quantum CosmologyMathematical Physicstext